Muscle Fiber Types - Fast vs Slow Twitch - High vs Low Reps for Muscle Mass and Strength Explained

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Article by Greg Knuckols:

Most trainees are aware of the differences between fast (type II) and slow twitch (type I) muscle fibers. Some have attempted to target specific muscle fibers in order to grow more muscle mass or build a specific skill, like strength or speed. In this video, I cover the mechanics of muscle motor units, discuss the difference between fast twitch and slow twitch fibers and explain the effect of high rep and low rep training protocols on their development.

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